Postcard from Isle Royale, Lake Superior, Near Duluth Paul Lundgren 5 months ago This undated postcard shows a scene from Isle Royale National Park, the fourth-largest lake island in the world, located about 150 miles northeast of Duluth. Recommended Links:Postcard of Duncan Bay from Lookout LouisePostcard from a Typical Lumber Camp in Northern MinnesotaPostcard from the Lyceum BuildingPostcard from the Steamer David Z. Norton